Respect locale environment variables on darwin.
In python 2.4+ on darwin, locale.getpreferredencoding() returns
mac-roman regardless of what LC_CTYPE, LANG etc are set to. This can
produce hard-to-notice conversion errors if input text is not in
mac-roman. So this patch overrides it with setlocale/getlocale if the
environment has been customized, on the assumption that the user has
done so deliberately.
#!/bin/sh
hg init a
cd a
cp $TESTDIR/binfile.bin .
hg add binfile.bin
hg ci -m 'add binfile.bin' -d '0 0'
echo >> binfile.bin
hg ci -m 'change binfile.bin' -d '0 0'
hg revert -r 0 binfile.bin
hg ci -m 'revert binfile.bin' -d '0 0'
echo % diff -r 0 -r 1
hg diff --nodates -r 0 -r 1
echo % diff -r 0 -r 2
hg diff --nodates -r 0 -r 2
echo % diff --git -r 0 -r 1
hg diff --git -r 0 -r 1
echo % diff --git -r 0 -r 2
hg diff --git -r 0 -r 2